Application of advanced laser consolidation process for the manufacturing of Complex FSP shells

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Authors
  1. Xue, L.
  2. Theriault, A.
  3. Islam, M.U.
  4. Purcell, C.J.
Corporate Authors
Integrated Manufacturing Technologies Inst, London ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The Integrated Manufacturing Technologies Institute (IMTI) of NRC has devloped a novel process called "Free-From Laser Consolidation" that produces functional net-shape components layer by layer directly from CAD models by using a laser beam to melt and re-solidify the injected powder (or wire). As opposed to conventional machining processes, this computer-aided manufacturing (CAM) technology can build complete parts or features on an existing component by adding instead of removing material. IMTI has investigated laser consolidation of Fe-, Ni- and Co-base alloys, and the work is underway on Ti-alloys. Laser consolidated (LC) IN-625 is metallurgically sound, free of cracks or porosity. The "as-consoldiated" IN-625 samples has surface finishes of the order of 1-2 *m (Ra) and dimensional accuracy of around 0.05 mm. The tensile properties of the laser-consolidated IN-625 alloy are comparable to the respective wrought materials. The microstructure of the laser-consolidated samples is similar to the rapidly solidified materials. Laser consolidation is a promising process for manufacturing functional net-shape components. The folded shell projector (FSP) is a compact flextensional sound source being developed at DREA for low frequency sonar applications including active towed arrays and sonobuoys. The design radiates from a thin walled cylindrical shell with superimposed corrugations. TRUNCATED
Keywords
Laser consolidation process;CAM (Computer Aided Manufacturing)
Report Number
DREA-SR-2001-094-SES-V-PAP-26 — Special Report
Date of publication
01 Oct 2001
Number of Pages
12
DSTKIM No
CA011863
CANDIS No
516441
Format(s):
Hardcopy;Document Image stored on Optical Disk

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